`, favicon, and body of `Root()` to\nmatch your app's existing `index.html`, and stamp anything else your shell\nreferences directly (images, css) with `immutableFileUrl()`.\n\n1. Create `frontend/root.tsx`:\n\n```tsx\n/** @jsxImportSource npm:hono@4/jsx */\nimport { raw } from \"npm:hono@4/html\";\nimport { immutableFileUrl } from \"https://esm.town/v/std/utils/index.ts\";\n\n// The HTML shell for the app. It is never cached, so immutableFileUrl can stamp\n// the current val version into each asset URL — the browser caches those\n// immutably, and publishing the val changes the URLs, refetching exactly once.\nexport function Root() {\n return (\n <>\n {raw(\"<!DOCTYPE html>\")}\n <html lang=\"en\">\n <head>\n <meta charSet=\"UTF-8\" />\n <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\" />\n <title>React Hono Val Town Starter

[{"_1":2,"_3":-5,"_4":-5},"loaderData",{"_5":6,"_7":8,"_9":10},"actionData","errors","root",{"_295":296,"_297":298},"routes/_app.x.$handle.$name",{"_11":12,"_13":14,"_15":16,"_18":19,"_17":-7,"_222":-5,"_20":223,"_22":224,"_225":226,"_227":228,"_26":229,"_24":230,"_231":-5,"_232":-5,"_233":52,"_234":235,"_236":43,"_237":-5,"_238":-5,"_239":240},"routes/_app.x.$handle.$name.branch.$branch.code.$",{"_11":12,"_13":14,"_15":16,"_17":-7,"_18":19,"_20":21,"_22":23,"_24":25,"_26":27,"_28":-5,"_29":-5,"_30":-5,"_31":-5,"_32":-5},"handle","namiko","name","dtb-b2-pruefungstrainer","branchName","main","version","path","index.ts","project",{"_33":163,"_13":14,"_44":164,"_165":-5,"_166":52,"_167":168,"_169":168,"_170":171,"_172":-5,"_173":174,"_175":36,"_176":43,"_177":-5,"_178":-5,"_179":69,"_180":181,"_182":183,"_184":185,"_186":187,"_188":-5,"_189":190,"_191":190,"_192":193,"_194":193,"_195":193,"_196":190,"_197":190,"_198":199,"_200":201,"_202":203,"_204":52},"tree",[55,56,57,58,59],"file",{"_33":34,"_13":19,"_35":36,"_37":-5,"_38":39,"_40":41,"_42":43,"_44":45,"_17":46,"_47":48,"_49":50,"_51":52,"_53":-5,"_18":54},"contents",[],"upstream","pull","ahead","behind","envVars","id","6a8d79c1-9b59-4c8e-abed-33a1ef5c3209","fileId","01a09c03-3284-7774-b28c-6141506b5175","parentId","branchId","b5973051-b776-4cf7-b052-057af2879abb","branchVersion",8,"latest",true,"createdAt",["D",1789325628627],2,"fileType","http","content","import { parseVal, serveFile, serveImmutableFile } from \"https://esm.town/v/std/utils/index.ts\";\nimport { Hono } from \"npm:hono\";\nimport { Root } from \"./frontend/root.tsx\";\n\nconst app = new Hono();\n\napp.get(\"/\", (c) => c.html(Root()));\napp.get(\"/__immutable/*\", (c) => serveImmutableFile(c.req.path));\napp.get(\"/source\", (c) => c.redirect(parseVal().links.self.val));\napp.get(\"/frontend/*\", (c) => serveFile(c.req.path));\napp.get(\"/data/*\", (c) => serveFile(c.req.path));\n\napp.get(\"/api/translate\", async (c) => {\n const q = (c.req.query(\"q\") || \"\").trim();\n if (!q) return c.json({ error: \"Missing q\" }, 400);\n try {\n const r = await fetch(`https://api.mymemory.translated.net/get?q=${encodeURIComponent(q)}&langpair=de|ru`);\n const data = await r.json();\n const translated = data?.responseData?.translatedText || \"\";\n return c.json({ source: q, translation: translated });\n } catch (e) {\n return c.json({ error: \"Translation service unavailable\" }, 502);\n }\n});\n\napp.onError((err) => Promise.reject(err));\nexport default app.fetch;\n","deleted",false,"label",[19],{"_33":138,"_13":139,"_35":140,"_37":-5,"_38":39,"_40":141,"_42":43,"_44":142,"_17":69,"_47":84,"_49":-5,"_51":52,"_53":-5,"_61":143,"_18":144},{"_33":80,"_13":81,"_35":82,"_37":-5,"_38":39,"_40":67,"_42":43,"_44":83,"_17":69,"_47":84,"_49":-5,"_51":52,"_53":-5,"_61":85,"_18":86},{"_33":73,"_13":74,"_35":75,"_37":-5,"_38":39,"_40":67,"_42":43,"_44":76,"_17":69,"_47":24,"_49":77,"_51":52,"_53":-5,"_61":78,"_18":79},{"_33":64,"_13":65,"_35":66,"_37":-5,"_38":39,"_40":67,"_42":43,"_44":68,"_17":69,"_47":24,"_49":70,"_51":52,"_53":-5,"_61":71,"_18":72},{"_33":34,"_13":19,"_35":36,"_37":-5,"_38":39,"_40":41,"_42":43,"_44":60,"_17":46,"_47":48,"_49":50,"_51":52,"_53":-5,"_61":62,"_18":63},["D",1789325628627],"children",[],[19],"ff7b69e8-3dd0-48d8-b61f-4364fd4b70b4","README.md","01a09c03-3284-7774-b28c-5f66369bbf24",1,["D",1789323849335],0,"# React + Hono Starter\n\nA minimal starter template for building client-side React apps with a Hono\nbackend on Val Town. Click **Remix** to get your own copy.\n\n## Picking a starter\n\n| Starter | When to pick it |\n| --- | --- |\n| [`basic-html-starter`](https://www.val.town/x/templates/basic-html-starter) | Static HTML pages. Sprinkle of vanilla JS. No server-side rendering. |\n| [`hono-jsx-starter`](https://www.val.town/x/templates/hono-jsx-starter) | Dynamic server-rendered HTML with JSX. API routes. No React, no SPA. |\n| **[`react-hono-starter`](https://www.val.town/x/templates/react-hono-starter)** *(you're here)* | Client-side React SPA with a Hono API backend. |\n\n**Want to build UI?** Start writing React components in\n[`frontend/components/`](/frontend/components/). Import them into `App.tsx` and\nyou're good to go. Styling is [Twind](https://twind.style/) — just use Tailwind\nutility classes, zero config.\n\n**Want to add an API?** Add routes in [`index.ts`](/index.ts) (there's a\ncommented-out example). Fetch them from your React components.\n\n## Architecture\n\n```mermaid\ngraph LR\n Browser -->|\"GET /\"| Hono[\"index.ts
(Hono server)\"]\n Hono -->|serves| HTML[\"root.tsx\"]\n HTML -->|loads| Entry[\"index.tsx\"]\n Entry -->|renders| App[\"App.tsx\"]\n App -->|renders| Counter[\"Counter.tsx\"]\n```\n\n## File structure\n\n```\nindex.ts ← Hono backend (serves frontend + API routes)\nfrontend/\n root.tsx ← HTML shell (stamps immutable asset URLs)\n index.tsx ← React entrypoint (mounts )\n favicon.svg ← App icon\n components/\n App.tsx ← Root component (layout + view source link)\n Counter.tsx ← Example component with state\n```\n\n## How it works\n\n1. **`index.ts`** is the HTTP entrypoint — a Hono server that serves the\n frontend and any API routes you add.\n2. **`frontend/root.tsx`** is the HTML shell — it loads Twind and stamps\n immutable asset URLs for the favicon and React entrypoint.\n3. **`frontend/index.tsx`** mounts the React app.\n4. **`frontend/components/App.tsx`** is the root layout — add new components\n alongside it.\n5. **`frontend/components/Counter.tsx`** is an example stateful component —\n replace it with your own!\n\n## Next steps\n\n- Add API routes in `index.ts`\n- Add new components in `frontend/components/`\n- Add a SQLite database — see the\n [React Hono Example](https://www.val.town/x/stevekrouse/reactHonoExample) for\n a full-stack example with database, queries, and shared types\n\nTemplate updates and upgrade paths for existing remixes: [CHANGELOG.md](/CHANGELOG.md)\n",[],[65],"34bf620a-b868-49cb-a033-3d034d489dbf","CHANGELOG.md","01a09c03-3284-7774-b28c-599d301570a4",["D",1789323849335],"# Changelog\n\n## 2026-07-30 — Immutable asset caching\n\nFrontend files are now served at version-addressed URLs\n(`/__immutable/45/frontend/index.tsx`) with\n`Cache-Control: public, max-age=31536000, immutable`, so repeat visits load the\nwhole client graph from the browser cache — roughly 3× faster (~665ms → ~157ms\nmeasured). Publishing your val bumps its version, which changes every URL, so\ncaches invalidate automatically. Old-version URLs return 404 after a publish\n(like Next.js build assets); a reload picks up the new version.\n\nWhat changed in the template:\n\n- `frontend/index.html` → [`frontend/root.tsx`](/frontend/root.tsx): the HTML\n shell is now JSX and stamps asset URLs with `immutableFileUrl()`\n- [`index.ts`](/index.ts): serves `Root()` at `/`, and one\n `app.get(\"/__immutable/*\", (c) => serveImmutableFile(c.req.path))` route\n serves all frontend files\n\n### Upgrading an existing remix\n\nYour copy of this template doesn't update automatically. Two options:\n\n**Minimal (most of the benefit):** point both routes at `serveImmutableFile` —\nyour existing bare URLs redirect into versioned space, the new route serves\nthem, and the whole module graph gets cached (costs one redirect per page view):\n\n```ts\nimport { serveImmutableFile } from \"https://esm.town/v/std/utils/index.ts\";\n\napp.get(\"/__immutable/*\", (c) => serveImmutableFile(c.req.path));\napp.get(\"/frontend/**/*\", (c) => serveImmutableFile(c.req.path)); // was serveFile\n```\n\n**Full upgrade (also removes the redirect):** three self-contained steps —\nno other files needed. Adjust the ``, favicon, and body of `Root()` to\nmatch your app's existing `index.html`, and stamp anything else your shell\nreferences directly (images, css) with `immutableFileUrl()`.\n\n1. Create `frontend/root.tsx`:\n\n```tsx\n/** @jsxImportSource npm:hono@4/jsx */\nimport { raw } from \"npm:hono@4/html\";\nimport { immutableFileUrl } from \"https://esm.town/v/std/utils/index.ts\";\n\n// The HTML shell for the app. It is never cached, so immutableFileUrl can stamp\n// the current val version into each asset URL — the browser caches those\n// immutably, and publishing the val changes the URLs, refetching exactly once.\nexport function Root() {\n return (\n <>\n {raw(\"<!DOCTYPE html>\")}\n <html lang=\"en\">\n <head>\n <meta charSet=\"UTF-8\" />\n <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\" />\n <title>React Hono Val Town Starter\n